1901.] MOLLUSKS FROM THE PERSIAN GULF. 391 



being two such spiral threads, one in the middle, the other towards 

 the base. The peristome is quite or almost continuous, columella 

 white, strongly one-plaited. 



This species differs, also, from all forms of the somewhat protean 

 S. cinctella Ad. in its slight ventrieosity and more elegant attenu- 

 ations of whorl, the body-whorl, especially, being broader in the 

 commoner species. 



Sykxola metria Melv. 



P.G. Bushire. 



I. Karachi. At low tide amongst mud, weeds, and loose 

 rocks. 



Very near some large forms of Odostomia, this species has, so 

 far, been found but very rarely. 



Oscilla i>-dica Melv. 

 I. Bombay {Abercrombie). Karachi. 



The commoner species of the two Oscilla?, found in the same 

 localities, but always distinguished by its oblougo-fusiform shape. 

 Reported from Aden by Commander Shoplaud. 



Oscilla torxata (A. Ad. inedit.) Melv. 



I. Bombay {Abercrombie). Karachi. Amongst muddy rocks 

 at low tide. 



Amathis filia Melv. 



I. Bombay {Abercrombie). Bare always ; in shell-sand. 



Elusa bruxxeomaculata Melv. 



P.G. Dredged in 5 fathoms, mud and sand. Gulf of Oman : 

 Malcolm Inlet (Kubbatt Ghazira), 24 fathoms. 

 M.C. Charbar, a few specimens only. 



I. Karachi, also rare. 

 This is a remarkably isolated form. 



Elusa strigillata A. Ad. 



P.G. Gulf of Oman, Maskat. 15 fathoms. 



I. Karachi. Amongst stones and mud at very low tides. 



Elusa suuulata A. Ad. 



I. Lat. 18° 58' N., long. 71 45' E. 40 fathoms. 

 An interesting shell, with narrow caudate apical whorls. Type 

 Japanese. 



\I m|; Ml/ LA M AC ANDREWI A. Ad. 



P.G. Lat. t:, 66 .V, long 57° 59' E. in Gulf of Oman. 

 M< '. Charbar. On rocks at 7 fathoms. 



A rery delicate species, peculiar for its numerous varices and 

 golden hue. 



BiOBMULA aiSSODTA A. \<\. 

 M.C. 



